Think about this idea for a moment or two and consider its value. All foodstuffs should cost exactly the same price per kilo. When you go shopping, you mere push your trolley onto a weighbridge and it tells you how much you owe. What might the implications of this be? Well, you'd get a lot more salad, pound for pound, than you would red meat. You'd find the cost of fizzy drinks became prohibitively expensive and you might as a bonus, be inclined to buy items with less packing if you knew that the weight of the packaging will be preventing you from having something you might enjoy instead. There would be social advantages to such a system, because it would mean the best cuts of meat would cost the same as the cheapest mince, and allow the poorest to dine on the food that the better off can, since the food would be sold on a first come, first served basis and when the ribs of beef ran out, the wealthy would have to try mince, or get up earlier. Another thing that would help make this system work, is to have any kids you take into the supermarket to wind even the saintliest up would need to stand on the weighbridge with the trolley. The fatter they are, the more you'll be paying for your shopping, so that will encourage you not to allow them to get obese. Or alternatively, if you thought of this as a tax on kids, you can avoid paying it by not taking the brats to the supermarket with you. What's not to like about this?